Line data    Source code

       1             : /* wait-user.c
       2             :    Copyright (C) 2000 Werner Koch (dd9jn)
       3             :    Copyright (C) 2001, 2002, 2003, 2004, 2005 g10 Code GmbH
       4             : 
       5             :    This file is part of GPGME.
       6             : 
       7             :    GPGME is free software; you can redistribute it and/or modify it
       8             :    under the terms of the GNU Lesser General Public License as
       9             :    published by the Free Software Foundation; either version 2.1 of
      10             :    the License, or (at your option) any later version.
      11             : 
      12             :    GPGME is distributed in the hope that it will be useful, but
      13             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :    Lesser General Public License for more details.
      16             : 
      17             :    You should have received a copy of the GNU Lesser General Public
      18             :    License along with this program; if not, write to the Free Software
      19             :    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
      20             :    02111-1307, USA.  */
      21             : 
      22             : #if HAVE_CONFIG_H
      23             : #include <config.h>
      24             : #endif
      25             : #include <assert.h>
      26             : 
      27             : #include "gpgme.h"
      28             : #include "context.h"
      29             : #include "priv-io.h"
      30             : #include "wait.h"
      31             : #include "ops.h"
      32             : #include "debug.h"
      33             : 
      34             : 
      35             : /* The user event loops are used for all asynchronous operations for
      36             :    which a user callback is defined.  */
      37             : 
      38             : 
      39             : /* Internal I/O Callbacks.  */
      40             : 
      41             : gpgme_error_t
      42           0 : _gpgme_user_io_cb_handler (void *data, int fd)
      43             : {
      44           0 :   gpgme_error_t err = 0;
      45           0 :   gpgme_error_t op_err = 0;
      46           0 :   struct tag *tag = (struct tag *) data;
      47             :   gpgme_ctx_t ctx;
      48             : 
      49             :   (void)fd;
      50             : 
      51           0 :   assert (data);
      52           0 :   ctx = tag->ctx;
      53           0 :   assert (ctx);
      54             : 
      55           0 :   LOCK (ctx->lock);
      56           0 :   if (ctx->canceled)
      57           0 :     err = gpg_error (GPG_ERR_CANCELED);
      58           0 :   UNLOCK (ctx->lock);
      59             : 
      60           0 :   if (! err)
      61           0 :     err = _gpgme_run_io_cb (&ctx->fdt.fds[tag->idx], 0, &op_err);
      62           0 :   if (err || op_err)
      63           0 :     _gpgme_cancel_with_err (ctx, err, op_err);
      64             :   else
      65             :     {
      66             :       unsigned int i;
      67             : 
      68           0 :       for (i = 0; i < ctx->fdt.size; i++)
      69           0 :         if (ctx->fdt.fds[i].fd != -1)
      70           0 :           break;
      71             : 
      72           0 :       if (i == ctx->fdt.size)
      73             :         {
      74             :           struct gpgme_io_event_done_data done_data;
      75             : 
      76           0 :           done_data.err = 0;
      77           0 :           done_data.op_err = 0;
      78           0 :           _gpgme_engine_io_event (ctx->engine, GPGME_EVENT_DONE, &done_data);
      79             :         }
      80             :     }
      81           0 :   return 0;
      82             : }
      83             : 
      84             : 
      85             : /* Register the file descriptor FD with the handler FNC (which gets
      86             :    FNC_DATA as its first argument) for the direction DIR.  DATA should
      87             :    be the context for which the fd is added.  R_TAG will hold the tag
      88             :    that can be used to remove the fd.  */
      89             : gpgme_error_t
      90           0 : _gpgme_wait_user_add_io_cb (void *data, int fd, int dir, gpgme_io_cb_t fnc,
      91             :                             void *fnc_data, void **r_tag)
      92             : {
      93           0 :   gpgme_ctx_t ctx = (gpgme_ctx_t) data;
      94             :   struct tag *tag;
      95             :   gpgme_error_t err;
      96             : 
      97           0 :   assert (ctx);
      98           0 :   err = _gpgme_add_io_cb (data, fd, dir, fnc, fnc_data, r_tag);
      99           0 :   if (err)
     100           0 :     return err;
     101           0 :   tag = *r_tag;
     102           0 :   assert (tag);
     103           0 :   err = (*ctx->io_cbs.add) (ctx->io_cbs.add_priv, fd, dir,
     104             :                             _gpgme_user_io_cb_handler, *r_tag,
     105             :                             &tag->user_tag);
     106           0 :   if (err)
     107           0 :     _gpgme_remove_io_cb (*r_tag);
     108           0 :   return err;
     109             : }
     110             : 
     111             : 
     112             : void
     113           0 : _gpgme_wait_user_remove_io_cb (void *data)
     114             : {
     115           0 :   struct tag *tag = (struct tag *) data;
     116             :   gpgme_ctx_t ctx;
     117             : 
     118           0 :   assert (tag);
     119           0 :   ctx = tag->ctx;
     120             : 
     121           0 :   (*ctx->io_cbs.remove) (tag->user_tag);
     122           0 :   _gpgme_remove_io_cb (data);
     123           0 : }
     124             : 
     125             : 
     126             : void
     127           0 : _gpgme_wait_user_event_cb (void *data, gpgme_event_io_t type, void *type_data)
     128             : {
     129           0 :   gpgme_ctx_t ctx = data;
     130             : 
     131           0 :   if (ctx->io_cbs.event)
     132           0 :     (*ctx->io_cbs.event) (ctx->io_cbs.event_priv, type, type_data);
     133           0 : }